Draconic Flames

The caster exhales a massive cone of flames, imbued with ancient Draconic magic. Each creature in a 30-foot cone must make a Dexterity saving throw. A creature takes 5d8 fire damage on a failed save, or half as much damage on a successful one.

The fire ignites any flammable objects in the area that aren't being worn or carried. While this spell is active, the caster is incapable of casting any spell with verbal components, and doing so will end the spell.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 for each slot level above 4th.